20751912 has 48 divisors (see below), whose sum is σ = 56489940. Its totient is φ = 6882048.

The previous prime is 20751881. The next prime is 20751923. The reversal of 20751912 is 21915702.

It can be written as a sum of positive squares in 2 ways, for example, as 20738916 + 12996 = 4554^2 + 114^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16158 + ... + 17394.

Almost surely, 2^20751912 is an apocalyptic number.

It is an amenable number.

20751912 is an abundant number, since it is smaller than the sum of its proper divisors (35738028).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20751912 is a wasteful number, since it uses less digits than its factorization.

20751912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1482 (or 1475 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 20751912 is about 4555.4266540029. The cubic root of 20751912 is about 274.8016729810.

The spelling of 20751912 in words is "twenty million, seven hundred fifty-one thousand, nine hundred twelve".